【py分析网页】可能有用的-re去除网页上的杂碎

def remove_js_css (content):
    """ remove the the javascript and the stylesheet and the comment content (<script>....</script> and <style>....</style> <!-- xxx -->) """
    r = re.compile(r'''<script.*?</script>''',re.I|re.M|re.S)
    s = r.sub ('',content)
    r = re.compile(r'''<style.*?</style>''',re.I|re.M|re.S)
    s = r.sub ('', s)
    r = re.compile(r'''<!--.*?-->''', re.I|re.M|re.S)
    s = r.sub('',s)
    r = re.compile(r'''<meta.*?>''', re.I|re.M|re.S)
    s = r.sub('',s)
    r = re.compile(r'''<ins.*?</ins>''', re.I|re.M|re.S)
    s = r.sub('',s)
    return s

• 去除空行

def remove_empty_line (content):
    """remove multi space """
    r = re.compile(r'''^\s+$''', re.M|re.S)
    s = r.sub ('', content)
    r = re.compile(r'''\n+''',re.M|re.S)
    s = r.sub('\n',s)
    return s

def remove_any_tag (s):
    s = re.sub(r'''<[^>]+>''','',s)
    return s.strip()

def remove_any_tag_but_a (s):
    text = re.findall (r'''<a[^r][^>]*>(.*?)</a>''',s,re.I|re.S|re.S)
    text_b = remove_any_tag (s)
    return len(''.join(text)),len(text_b)

def remove_image (s,n=50):
    image = 'a' * n
    r = re.compile (r'''<img.*?>''',re.I|re.M|re.S)
    s = r.sub(image,s)
    return s

def remove_video (s,n=1000):
    video = 'a' * n
    r = re.compile (r'''<embed.*?>''',re.I|re.M|re.S)
    s = r.sub(video,s)
    return s